That's basically what Jose's strategy seems to be though: get the ball up to Kane or Son and rely on their individual brilliance combining for goals. Of course it's going to work some of the time because Kane and Son are phenomenal, world class forwards who both outperform their xG more than almost anyone else in Europe. But when one or both are injured, not firing, or just unlucky, everything falls apart -- they can't even rely on not conceding and hoping for the draw or sneaky 1-0. They've gone from being the Harry Kane Team to the Kane & Son Show.
This dependence on fantastic forwards playing well is, I would suggest, why Spurs' results are so unstable: there's no clear system or philosophy at work, other than bypassing as much of the pitch as possible on the way to Kane and Son. In Jose's defence, however, the team behind Kane and Son is, with few exceptions, painfully average, to the point that you could argue that Jose is merely trying to play to his squad's strengths.
Spurs will wreck teams other than Southampton just as badly or worse this season (frankly, Kane was unlucky not to add another two goals to the damage, with both discounted through little fault of his own). They're also going to suffer some shocking defeats. They can already count themselves very lucky not to have been dumped out of the EL by that team whose name presently escapes me -- Ndombele's late goal there was a fluke.
Spurs won't come close to winning silverware with this combination of top-heavy squad and defensive manager. Their game is much too unreliable and inconsistent to win competitions.